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Title: Classification of Matter
Description: Brief summary regarding the classification of matter. Entry level chemistry.
Description: Brief summary regarding the classification of matter. Entry level chemistry.
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Classifications of Matter
Matter is anything that occupies space and has mass, and chemistry
is the study of matter and the changes it undergoes
...
Solids are rigid objects
with definite shapes
...
Like
liquids, gases are fluid, but unlike liquids, they can expand indefinitely
...
Upon heating, a solid (for example,
ice) will melt to form a liquid (water)
...
) Further heating will
convert the liquid into a gas
...
) On the other hand, cooling a gas will cause it to
condense into a liquid
...
A substance is matter that has a definite or constant composition and
distinct properties
...
Substances differ from one
another in composition and can be identified by their appearance,
smell, taste, and other properties
...
Some examples are air, soft
drinks, milk, and cement
...
Therefore, samples of air collected in different cities would probably
differ in composition because of differences in altitude, pollution, and
so on
...
When a spoonful
of sugar dissolves in water, the composition of the mixture, after
sufficient stirring, is the same throughout the solution
...
If sand is mixed with iron filings, however,
the sand grains and the iron filings remain visible and separate
...
Adding oil to water creates another
heterogeneous mixture because the liquid does not have a constant
composition
...
An element is
a substance that cannot be separated into simpler substances by
chemical means
...
Chemists use alphabetical symbols to represent the names of the
elements
...
For example, Co
is the symbol for the element cobalt, whereas CO is the formula for
carbon monoxide, which is made up of the elements carbon and
oxygen
...
Most elements can interact with one or more other elements to form
compounds
...
Hydrogen gas, for
example, burns in oxygen gas to form water, a compound whose
properties are distinctly different from those of the starting materials
...
This composition does not change, regardless of whether the water
comes from a faucet in the United States, the Amazon River in Brazil,
or the ice caps on Mars
...
Title: Classification of Matter
Description: Brief summary regarding the classification of matter. Entry level chemistry.
Description: Brief summary regarding the classification of matter. Entry level chemistry.